JEE Main 20262 Apr, Evening shiftChemistryEasyd- and f-Block Elements158× since 2002Among Fe2+\mathrm{Fe^{2+}}Fe2+, Fe3+\mathrm{Fe^{3+}}Fe3+, Cr2+\mathrm{Cr^{2+}}Cr2+ and Zn2+\mathrm{Zn^{2+}}Zn2+, the ion that shows positive borax bead test and with highest ionisation enthalpy is :AOption A. Fe2+\mathrm{Fe^{2+}}Fe2+BOption B. Zn2+\mathrm{Zn^{2+}}Zn2+COption C. Cr2+\mathrm{Cr^{2+}}Cr2+DOption D. Fe3+\mathrm{Fe^{3+}}Fe3+CheckStep-by-step hintSkip · show solution
